The parent function of tangent, y = tan x , has vertical asymptotes at and pi/2; (3pi)/2 Explain why this is the case

Ill mark the brainliest if you me with the these three questions 7,8,9

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.